Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69717fa76288cd25d81339845cb887cade77fb2ed82ba5cd965e234dbd2fc24c' 
  AND token = 'cWaqZPYA6XqmmN0bupfrm+VS2Zx3KJ0PAQZRru0QZgY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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