Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d836a8654064822ed133de6cbe62b459eaf4829fe56f0215d1819f016bb452b' 
  AND token = 'gRV1NKNCOn0iDgBW3HQP4pV7YnBdwDLfXjduMKKLHV0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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