Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3a707fd39be3acf98e26c9a5f81a368f6d81d0ab870f2120c9c49503e30d8fb7' 
  AND token = 'Lzv7AnZi2u3W1qiLQsrq1gBukBfF99OvN1f04CcUeqk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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