Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '056421d9665132b3a82e5c6982eef96f9c4057a691cbc5524ee644087c50ac8e' 
  AND token = 'VMk7pwugcFG9v9Py/8DYHIn2mokKU76VtpbDBkceb8A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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