Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe2edd7d942bf19a3f4eb6b92d7ffa7787deb78cf6f72a99bdc2df7635fe407c' 
  AND token = 'wqRib6bn9urIEVAb0KPLooBFi6J/GgZO/mjNWKNP47M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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