Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '348bc1e0e386a97cefea76a348fe93a0e5c8c6f8be0570c968bed748e1e9eeff' 
  AND token = '53foxLZ4MixBb25HJwJoJL9uLCMuJgUlWYoRh15fWKk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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