SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '37bcf389525d13c769ef5a18a9af5821d9f36b3326798f7b846dc6fbd04f7a2d' 
  AND token = 'f9ldS7GVGgKbzbk2yFPhp4M95CHxvXLvF69vK3UhDNo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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