SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'd1c7227563e157b898a4a7918fcf3ebb45bba3bc3bfa4cdb2402855017d22193' 
  AND token = 'PE5aOq/2Xn+SlJhzEPJ6TwOkHvDNCuS2J4GpW197Y4s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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