Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'ef1252e6d417ea098d8ed47d4af6f7be9af49026340e9bcd005f3f4bd305ecee' 
  AND token = 'N/7OXQuDY/F/z3QiTt3oeHS5Zx4rUkdbyhw4RpNmjx0=' 
  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"
    }
  }
}