Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd82870a7c3dcc8345fc13929a38bca3756f2deaff154b5e2412553ec4e750342' 
  AND token = 'WmpAxKh2gprZzGJC3O6ziATxtI4UkEGoMIErStmY50g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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