Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0c7c4967ca39e9237e10c9297b17a422975592af811036ff195e78895344a984' 
  AND token = 'nK8JYmwOrnbOpbp+y07wH8bKCdLTzrBU4LAm97EeY00=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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