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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'b3bb713ab27187de4e2675be52bd89c2500e98479420004df15513a6ee2e3061' 
  AND token = 'VD+IqPuO6BbdfxhoMxINLxjplwWG/xf3e8bmAEB2On4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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