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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '9e93b31e19a6beb34d371fd26e73b41f849a91f6a9278ac606db170cba54aa0a' 
  AND token = 'ekCvSVs6HFA19aJq63T8ufRqZvg9PEZcxZ6fRwTbX/U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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