Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce49651c0fda3f701a670c3b72f1c0cd7c061f14f2fd5b3ed39c9d91d9a57313' 
  AND token = 'AqOmqL3AAjYHeLHE4Tkt4xaFhi0UfDkGl8f+CoXMR1g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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