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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a410ae9363f01ae6734d74a080fd14a9fba82da0f2f1d88cf48589e7e5250ff3' 
  AND token = 'LM8SeKlR4jrCA7y6RDhEvqKxLSKSEPuRHe5WRPJb0k4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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