Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '002d9b89ca5fc213ed09424052f685181110fb15a80615653a5fc5e4fb8bab6e' 
  AND token = '4uTLY2i+j3neu8SoQXLF0dJrS9wA78W78kKpgDdPUX0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}