SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'e2d7c30bfbe11dfb1986f4dca6263427543e1378ad9c7952de2b6af58af87f5b' 
  AND token = 'wYfuTRHWQrWmIkglJthOn6FYyVpOKtCE5O5wTKHd9Kw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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