SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd96dd82e9e3dcf0db6189f7a3262cf9f032a64c755071a805464e3cc1b553423' 
  AND token = 'J9W6OpMegU9xhxAQHQpa+R0jUW/YKwRpwZvKZq+NTs4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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