Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62999efbc02d6eb1858b1e446dfad1ce80659d05b638f5e0408b4b1c050a6a35' 
  AND token = 'jRwiXZb8g9n4GgqRtKIHIaoUhuEcBbw4Cof9XKuNW9k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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