Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b26801839c2d3b16dd9505091a36d24b2109af678f4c3654776c20f35972b9eb' 
  AND token = 'wXPqy8Fz+YAJb46587ZRP0Br6OoLqusaTjByOd20FbA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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