Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '29d364fc424eab742960b82cede7e349715ba36722f7f3b5a9131e9edf14bff6' 
  AND token = 'zdP599OpOtPaiAJgCgrNN9SZp5EADy4vUZ2okLQPiHA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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