Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'd07002e9503876187d91beeb4049a217dc2c1b934c93ef9e3d44feaea7c34ee5' 
  AND token = 'jelJ2iYcF+cvzUF9S8NvzjbMgSTjqvvYEMbuQ/fJ//o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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