Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bc5d13201ab0a48d4de3816b215158ec1f0ef5c9813df4c20281db324005c7e3' 
  AND token = 'B/lOVft3umFxc1/IlmMdoiCT84IjyhUmUIXfltJ5QrU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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