Sandbox

SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '788e3c87b68b031a9bb911b330f29b8b704dac5ff2d4035b08568505d1230737' 
  AND token = 'IanmglI7/CDFib3gWHqnmrM/7WqAx0quJJbNERIhCek=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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