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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb5980e85e0ee1122663b293c959426aab2b9dcfda93794db7096793c55f6ce2' 
  AND token = 't1F4kqQEqrBdXkdNLIgjT5pHZjxyxny8Kzxj1QoU1gQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}