Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65d4495081e43e9c8b4cec5242722bbfffecd2e419308fffb2f9af048e7136cd' 
  AND token = 'o3KMA/WAKRmY4nrepbXZTa2y86CK92/hll1/S9VsfjY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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