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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '69093820470c9af7f0d5527f0333e2c1809e91374e16275fde779ebec39980e3' 
  AND token = '7TZLmwo7fZOQs2K3kog8e9G8xoCTbOtMDusAyFd3PEM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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