Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c1ccf265b4cef3b3be07c9f29c912db00ef395656fdbdc18d5bc90849fdaf48e' 
  AND token = 'sIaC2AKKcIBcmC+JKAJR5c7obynmh3iepnYVxHLeTvw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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