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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '930ada4ab5f178a953d53d4811320a0465f65f6c587889796f9111627ff72055' 
  AND token = 'cSnoeflYfw5EDfquCEJ3Kiqphx2BAkWbPsVNIx5a/IU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}