Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '74f46547696d07d29a2efb2915f586df5a08c0a7eab2c045f0f5a650689c9669' 
  AND token = 'KwMbxM7KVw12ovh1WjV7WIfBrQvj+jyeKoeLsZxwE3Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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