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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '0886b9bd8bbd3c3221d1240aa85b180050321262c4b4c11474b1b4d644325528' 
  AND token = '+8SM13KmAYWi3qgDruTRlAl6uwS1N5y1ZqLhq+Qy8ZI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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