Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '71b40aef39818e7c7ba572305cabe719f471fda67cfc3ad77931ab39b228b8ea' 
  AND token = 'WM+xdkcz3h+pQeBnoVvN2/2pFNrjlY5a6x1fhYVQAtw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00058

JSON explain

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