SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fdd46b955d94b4f7c996e5c1ea3713514c33420e495302f53e1d25c487996ff3' 
  AND token = 'uwhWGnGsvuFhyUuDbu0V/x+d8SY7DMxPBoM9fWQ68Ng=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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