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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '08360c5ba6ae62a960cc45dd68a4a8faefe6a757412b49afbdc3366dd770776b' 
  AND token = 'xbSgb7vzeatt+AVLQawq9C6XKfemV5DIXRs7ZN22wr4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00335

JSON explain

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