Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd29bc12752dc84646151d9fc1834c4e3553c1c1178b41adc161510135421ea1b' 
  AND token = 'KZ9rMoyehrcedkNoWJPteHFrJaZQGNCrv++0iG+TqpM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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