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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cf4c8f8f34379b0aa93df477ced4a7952a48b686ac67cbf60d8a1b4094aa6c5f' 
  AND token = '8PXY2WsD2hf7dL2C5Gk9k9Cwe3gGXZoY/kzzGRkwUwI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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