Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a5b0450532b3f7a545efd4552311da2f5ee3b3771a7b4f366bb93643bf3e9473' 
  AND token = 'bi/L3310DBP1gKYYzddCSv7CfXNzpe7CwRHhNVxzcYs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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