Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6df48ca1a257fef53fb2924c8af1b9631299fc2cdb40fb1f699daa3414d58985' 
  AND token = 'hygoNfvL7ByRdUEPdTE9Z/2lNKT4QN7TiOw1iGD7TzY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}