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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '2f69e56b41857afcd0e8721abc37a2f1c32aec5935ea59d66f03ac8c945ddfef' 
  AND token = '51+jAuSuwaDw92WmPdJUELyKleKJsLCiKQs17SQAlpU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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