Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '77724ad8d1b00bde4c82504ea3a0933375ad19016998c5263bfc0a441c2cff27' 
  AND token = 'mEAM4bRT1f4UIMqdKcsRRiq7t4mVgR2P8+L25tdkNcM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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