Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1df290659b402d2df2e1ddaa796cc3650f0b154d7b47608f37a81fdc93d43ac0' 
  AND token = 'gH8INKZugXvHd1lhTCr6RIZrsai+84yy+WlAVE+wMRc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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