Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '50fd5085578f4038242d68bdfdddc757126c13fa9d1dda925ff79ea33af8734f' 
  AND token = 'od32tCsFXtambtXdT+nwl4cb9EFXiCdYWXc2pOkOjHQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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