SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '9229091da0b12b568a5b4a04170a26e291658a91b782743a52d1a9091d956536' 
  AND token = '6sIPc+31BY6y96KfCr1Z6jVQhVYDsUuBBzgXZv1hZdE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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