Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '87f27986ad369539809d4d8e74fb5b50be67a5830c6e7c65e664042622829537' 
  AND token = 'mTIj1bgsxB3l5MGdih0ZEUVCQTenefnut9SEI029QTI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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