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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '82afaac1cfad4f86c066d7f7bb29c3c5f1be817b099a4bf6d9e12088d629e2ec' 
  AND token = 'Oo+wMrAiQo+tvLtJHt02aQwwov6a7K7Ftrq6KrcbQPc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}