SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '62b1bc3831cf46562df0ce4a179e048a01550ff65d16fd404057689900ccb163' 
  AND token = 'CwQE7VSDj5veNezragKOPMxRzeDTAh8FZJsNsM+z2q0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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