SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7e66c9d8056f2b386ac6aab459c5abb53126d71aa8df361eef84d0be81fbf903' 
  AND token = 'IvGGm96UjwGkH/9D1/aLKVToiKQWx+FSY6/v4g46afI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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