Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '1e6911aeb445ee88acc9de77c947dc655e07252cb065cf2bd7a350eab39dcb48' 
  AND token = 'PndddQcY+6YYgRaVaelbddbbV/Ka8MjppG+r4xVUGPU=' 
  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"
    }
  }
}