Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '12a5508d111b76e1e116a129a743f2a68b7817751436fd21ce647118e85e42ae' 
  AND token = 'vfkRzhFJ7wyeX2WKeufAoCoqXffIjtq5Ad5vy5A7Qm0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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