Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c1f8d9fefa2dcccdd445d000240d321c0d0889297cffd4b2e8187f29008af24' 
  AND token = '15tiLYvEgNLV818OHI8TkrTQTEGZta/Crr+hyKRuvaE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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