Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a16bb9730a9ad0951c26a00f04d1ccf09e35bd981d848002cda6b03272decc19' 
  AND token = 'pFnUtvjWBpDSdMAZjSt8/fhPWA/p1wA+IbYCIQcNhW4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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