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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8022ec093749c169eb3c17a22fedcded57e816454c1cac135b3b0ebb3db7eafe' 
  AND token = 'DUsru3y11/SqSS9qET1GVn1h9gJLBgwAT27q7X/B40c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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