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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '613cdc41c7d793b1838996c902835affbcf37dd5cc7a8148ae6a591258b7cddf' 
  AND token = 'gEDFs2CmrQSxafB2klqoIS4vA+FaiWUMolE7KutL/cs=' 
  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"
    }
  }
}