SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '65bdd14476a97a7469201b28152208ad9a99f8bd3844ff3edcce79ce8d78206f' 
  AND token = 'fpH/zMPnL6A+uKQ7KDfouJZLrNpwqgnqjl+EUBL33sE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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