Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cfa5a2320de3e50a7a1be4c8b9ca860af21ef2b3bdf46b3ba0043829c9744554' 
  AND token = 'o3o5KXGgmtWSMJYoWlXd9Isq1Ni5fe5/EG4zMg4Zxqw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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