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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '1f53c855b502f2bbeb55ae9717778538c81b3acf5ec3e3f17dc9fcca4cb8e84b' 
  AND token = 'aro31yN9Z0tyva2fMHwJ6Zm+m6jWWuzVK8IEHy9DHFo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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