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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '5010cd87447efe44196c5d430dc9d9326fe1c7555f8096c11c6a84430599cbee' 
  AND token = 'DE8VjA+olnWR/r/5BJVl1xhCVGkwL9O7e8agnpgnWBc=' 
  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"
    }
  }
}