SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5c65452d7483a7264c7b972411828ecb587bf76ac97f4876845bd6df8ea29ccf' 
  AND token = 'lOjJbjgr4OYsnheqw0L7uEK27w/Ysqx5LrRAK9JPkfc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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