Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f4663e65a32311dcdf9803422c88a1fd4fd4322193fc52a72b1b44ce14d53702' 
  AND token = 'EAcMSC1ERquiA5tkt6SFiNP4VY6xOpWTK9iVkgbyY9Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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