Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2e565c1569ca44dbef0ad6226017f5f163db90b2e6a8092374effaefd497b51' 
  AND token = 'XE5oNp9VRPEwetOVvqFDDGdX6x0DU12WWrrA60VvpM0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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