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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd59bc53cb08b5475dcb16baaadbda489695a77b6b3c922ae1596d6f45d182507' 
  AND token = 'NOpIfFqx89Y6kNbhpl09mIdEMSfUzG64V/g78emGU7g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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