Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58993667e3d4667a0b628e0cedcb2c672f4e2121ba8bf75f3adf0ccedf070b7c' 
  AND token = 'H3CHvmDc/IJA336W4G09zbbCDnyaWtlhE4ifUsbmAPI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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