Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca29e866cfc24ddc96187b610fc04846ddea2b10d5da82e0793483b8ecc2c105' 
  AND token = 'D2RaDjYpeSls0wJtn3pNA401CFm1EcUxFeA5oQPzMDc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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