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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'c9bf500003c83baddbdd5a6260c76685aa3d22e156edff2a21e07bb94ec0a9e3' 
  AND token = 'AC030QwPd6/sO6b4GTAX7UzDD2KfRpKmUBb62+BENwY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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