Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e018a19b10df5f3a21c348d9e009d24f782c4fa965b6d0b719e5c7eca045fa72' 
  AND token = 'HTH7DmUSdJr1jPvJRre7Scea7R4ULBfyj0YGGgmKfjo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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