Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4aa90c3d81e8929e333336ff8820d0d7d9356ec686099c4cae14136671e6c476' 
  AND token = '3qHiNqKB3Spx+OwIqlz1lI0+H6IpAPK25q7v5hkm4hc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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