Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '5877bc8d599868a576dea2089b7d475aad8f4b6f0ebed882b6e96086246b7e8d' 
  AND token = '3IT37LWZvMP6QmkHMPRqo+F6iG8ipFw9ahl9aHrHro0=' 
  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"
    }
  }
}