SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '1c50c446edc0f22375c6ad456b93fd7f9bbd39f2a0b5729c2d41a51289a1b99f' 
  AND token = 'pOgvB1tAGfguUBUZS8hf5YlOajecrTU/W+m42AH/FUo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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