Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f00f05b17129f63f7e307b3c37d41eafe6e496a41b13734382ef73392d04b3cc' 
  AND token = 'oBHP1vw/wfM8kToFSd0WOE1Div+OJWyiiQ3BO4IiOdI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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